title: Dual-energy radiographic absorptiometry of the lumbar spine: clinical experience with two different systems.
abstract: Dual-energy radiographic absorptiometry (DRA) of the lumbar spine was performed in 222 subjects (aged 17-92 years) of both sexes with use of two different systems. In a sub-group of 21 patients, results were compared with those obtained by means of dual-photon absorptiometry (DPA) of the lumbar spine. There was a high correlation among the results obtained with three instruments (r = .9, P less than .0001), and interconversion factors were calculated. Data conversion based on these regression equations may be useful for comparing results from one laboratory to another.
authors.affiliation: Department of Radiology, Veterans Administration Medical Center, San Diego, CA 92161.
authors.forename: C R
authors.initials: CR
authors.lastname: Gundry
authors.forename: C W
authors.initials: CW
authors.lastname: Miller
authors.forename: E
authors.initials: E
authors.lastname: Ramos
authors.forename: A
authors.initials: A
authors.lastname: Moscona
authors.forename: J A
authors.initials: JA
authors.lastname: Stein
authors.forename: R B
authors.initials: RB
authors.lastname: Mazess
authors.forename: D J
authors.initials: DJ
authors.lastname: Sartoris
authors.forename: D
authors.initials: D
authors.lastname: Resnick
mesh_terms: D015502:Absorptiometry, Photon / Q000379:methods; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015519:Bone Density; D005260:Female; D006801:Humans; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D010024:Osteoporosis / Q000000981:diagnostic imaging; D015900:Radiography, Dual-Energy Scanned Projection / Q000379:methods*; D012044:Regression Analysis